Could I be pregnant?

My boyfriend and I haven't been having sex for long. Maybe just over a month or two. We use condoms every time and one has never broken or anything, but they do slip sometimes and we just need to pull it back down a little. About a week or two ago I expirienced a dark brown spotting that lasted just over a week and a half. I also have been feeling sick in the morning (naseuos without vommiting), and my period is currently four days late. Please help me out??? 😁 **PS** I can't get a pregnancy test because my parents don't know I'm having sex